TpLinkSmartPlugEncryption.cs

internal static byte[] EncryptMessage(byte[] pMessage, ProtocolType pProtocolType)
        {
            List<byte> byteList = new List<byte>();
            int num1 = 171;
            if (pMessage != null && pMessage.Length != 0)
            {
                if (pProtocolType == ProtocolType.Tcp)
                {
                    byteList.Add((byte)0);
                    byteList.Add((byte)0);
                    byteList.Add((byte)0);
                    byteList.Add((byte)0);
                }
                for (int index = 0; index < pMessage.Length; ++index)
                {
                    byte num2 = (byte)((uint)num1 ^ (uint)pMessage[index]);
                    num1 = (int)num2;
                    byteList.Add(num2);
                }
            }
            return byteList.ToArray();
        }
        internal static byte[] DecryptMessage(byte[] pMessage, ProtocolType pProtocolType)
        {
            List<byte> byteList = new List<byte>();
            int num1 = 171;
            byte num2 = pProtocolType == ProtocolType.Udp ? (byte)0 : (byte)4;
            if (pMessage != null && pMessage.Length != 0)
            {
                for (int index = (int)num2; index < pMessage.Length; ++index)
                {
                    byte num3 = (byte)((uint)num1 ^ (uint)pMessage[index]);
                    num1 = (int)pMessage[index];
                    byteList.Add(num3);
                }
            }
            return byteList.ToArray();
        }